20212-5147 HDS 2907
20h 21m 10.95s -51° 47' 28.6" P.A. 35.00 sep 0.3 mag 10.86,11.32 Sp M0 dist. 24.01 pc (78.32 l.y.)
Coord 2000 |
20212-5147 |
|
Discov num |
HDS2907 |
|
Comp |
|
|
Coord arcsec 2000 |
20 21 10.95 -51 47 28.6 |
|
Date first |
1991 |
|
Date last |
2021 |
|
Obs |
12 |
|
Pa first |
31 |
|
Pa last |
35.1 |
|
P.A. Now (θ) |
45.9° |
|
Sep first |
0.3 |
|
Sep last |
0.317 |
|
Sep. Now (ρ) |
0.309" |
|
Mag pri |
10.86 |
|
Mag sec |
11.32 |
|
delta mag (ΔM) |
0.46 |
|
Spectral class |
M0 (red) |
|
Pri motion ra |
-040 |
|
Sec motion ra |
|
|
Pri motion dec |
+094 |
|
Sec motion dec |
|
|
Notes |
O
(Orbital solution) |
|
This double is physical.
OTHER CATALOGS AND DESIGNATIONS
Constellation |
Telescopium |
|
HIP |
100356 |
|
Tycho2 |
8417-00626-1 |
|
Gaia DR2 |
6475337306723609600 |
|
GL |
NN 4145 |
|
Distance |
24.01 |
|
Distance ly |
78.32 |
|
ORBITAL ELEMENTS
Period (P) | 9.886y | ± 0.129 |
Periastron (T) | 2017.514y | ± 0.016 |
Semi-major axis (a) | 0.1948a | ± 0.0047 |
Eccentricity (e) | 0.651 | ± 0.016 |
Inclination (i) | 48.8° | ± 2.3 |
Longitude of periastron (ω) | 194° | ± 5.5 |
Node (Ω) | 32.7° | ± 3.2 |
Notes | | |
Reference | Tok2017b | |
Equinox | 2000 | |
Last observation | | |
Grade | 3 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
20.5 |
0.243 |
2001 |
30.0 |
0.294 |
2002 |
37.3 |
0.316 |
2003 |
44.2 |
0.313 |
2004 |
51.9 |
0.286 |
2005 |
62.0 |
0.235 |
2006 |
80.0 |
0.160 |
2007 |
137.8 |
0.079 |
2008 |
291.7 |
0.060 |
2009 |
5.9 |
0.168 |
2010 |
21.8 |
0.250 |
2011 |
30.9 |
0.298 |
2012 |
38.1 |
0.317 |
2013 |
45.0 |
0.311 |
2014 |
52.8 |
0.281 |
2015 |
63.5 |
0.228 |
2016 |
83.3 |
0.150 |
2017 |
151.3 |
0.074 |
2018 |
311.1 |
0.068 |
2019 |
8.5 |
0.179 |
2020 |
23.0 |
0.258 |
2021 |
31.8 |
0.301 |
2022 |
38.9 |
0.317 |
2023 |
45.9 |
0.309 |
2024 |
53.9 |
0.276 |
2025 |
65.0 |
0.220 |
2026 |
87.1 |
0.140 |
2027 |
166.0 |
0.072 |
2028 |
325.9 |
0.079 |
2029 |
10.8 |
0.190 |
2030 |
24.2 |
0.264 |
|
|
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
|
|
|
|
|
|
|
|
Measures: green=micrometric, blue=interferometric, purple=photographic |
|